Add moduleSuffixes to tsconfig (#11146)

Co-authored-by: Claude <noreply@anthropic.com>

tsconfig.check.web.json

@@ -0,0 +1,24 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "moduleSuffixes": [".web", ""],
+    "paths": {
+      "#/*": ["./src/*"],
+      "crypto": ["./src/platform/crypto.ts"],
+      /*
+       * expo-file-system/legacy resolves to the package's raw TypeScript
+       * source, whose internals break under .web module suffixes. Point it
+       * at the compiled declarations, where skipLibCheck applies.
+       */
+      "expo-file-system/legacy": [
+        "./node_modules/expo-file-system/build/legacy/index.d.ts"
+      ]
+    }
+  },
+  "include": [
+    "index.web.ts",
+    "src/**/*.web.ts",
+    "src/**/*.web.tsx",
+    "src/platform/*.web-check.d.ts"
+  ]
+}